The paper presents the results of a study of the Benedict test for deciding the diagnosis of lactose intolerance in children and the effectiveness of lactase drugs. Benedict test is one of the standard methods for the diagnosis of lactose intolerance in children. Drugs with lactase enzyme that helps break down lactose (hydrolysis) into two simple sugars, glucose and galactose, which simplifies digestion. Lactase drugs has been shown to be the best way to preserve natural feeding in children with lactose intolerance, since the lactase composition is involved in the breakdown and absorption of carbohydrates and proteins, produce essential vitamins for improving the health and immunity of the child, normalize the composition of the intestinal flora. The use of mothers in the diet of easily digestible carbohydrates significantly increases the lactose content in breast milk, significantly increases the risk of developing lactose intolerance in children. When coprological study noted the disappearance of signs of excessive fermentation. It is shown that lactase drugs is an innovative and effective solution to lactose intolerance, the best way to preserve the natural feeding of children with lactose intolerance, as it reduces the load on the intestinal mucosa, preventing the development of characteristic symptoms of lactose intolerance in infants.